A horse in Boulder County was diagnosed with West Nile virus Friday.
Elsewhere, Denver, Jefferson, Weld, Larimer and Pueblo counties have reported that they have found mosquitoes with West Nile, which can be deadly for humans.
“Older individuals are more likely to have severe outcomes but we have seen significant illness and death in even the younger age groups,” said Jennifer House, state public health veterinarian.
The virus can cause severe neurological symptoms. So far this year, there’s been just one human West Nile case in Colorado. But last year, Colorado saw four fatalities and 118 cases.
House urges people drain standing water, and when outdoors from dusk to dawn, to wear long sleeves and use a mosquito repellant.
